Street sweeper



E. K AND P. C. WARD.

STREET SWEEPER. APPLICATION FILED OCT. 6. 1919.

vPatented July 11, 1922.

IIIIIHW Y I 1 3'8 30 1 Z? Z6 L1;-

f fth.

EDWARD K. WARD AND PIER C. WARD, OF ST. PAUL, MINNESQTA.

STREET SWEEPER.

Specification of Letters Patent.

racemes. July 11, 1922.

Application filed October 6, 1919. Serial No. 328,856.

To all whom it may concern Be it known that we, ED'WARD K. /VARD andPIER C. WARD, citizens of the United States, residing at St. Paul, inthe county of Ramsey and State of Minnesota, have invented new anduseful Improvements in Street Sweepers, of which the following is aspecification.

Our invention relates to improvements in street sweepers.

Our invention is adapted to be used in connection with a vacuum streetcleaner in which dirt, dust and refuse material are removed frompavements by means of brushes and the suction produced by revolvingfans.

The object of our invention is to provide automatically adjustable meansfor cleaning gutters and portions of street pavements adjacent to curbs.

In the accompanying drawings Figure I is a plan of our invention; andFig. II is an elevation thereof.

In the drawings the numeral 10 indicates a frame rigidly attached to theunder frame of a street vacuum sweeper of any usual design, such forexample as that illustrated in United States Patent No. 1,107,564. ofAugust 18, 191 1, to Edward K. \Vard. The pipe 11 is the usual conduitfor dust and refuse leading to the suction head and dirt receptacle ofthe street sweeper. To the pipe or conduit 11 we attach by means of aflexible accordion pleated tube 12 an auxiliary pipe 13, provided at itsouter extremeties with a downwardly flaring housing 14, open at thebottom and adapted to receive and conduct through the pipe 13 to theconduit 11 dust and refuse removed from the surface of the pavement bythe steel scraper 15 and brush 16.

The housing 14, scraper 15 and brush 16 are attached to and carried by aframe 17, provided with arms 18 and 19 in which are journaledhorizontally revoluble wheels 20 adapted to form a rolling contact withthe street curb represented by the line 21 in Fig. I. The frame 17 isslidably attached to the frame 10, and the arms 18 and 19 are flexiblyconnected with said frame 10 by rods 22 attachedat their outer ends tothe arms 18 and 19 and slidablein tubes 23, which at their inner endsare attached to the frame 10 by means of drop hinges 24:. Spiral springs9 housed within the tubes 23 and bearing against the inner ends of therods 22 tend to press the wheels 20 against the curb, but, in case ofinequalities or a arm 19 and at the other to the main frame of thesweeper to protect the mechanism of our attachment from strains due tostriking obstructions in the street.

A supporting wheel 27 is journaled on a stub shaft 28 fixed in the outerend of the frame 17. This wheel serves to support the outer end of theattachment when the scraper 15 and brush 16, because of compression orwear, fail to carry the weight of the outer end of the frame 17 and itsattachments.

Having described my invention what I claim as new and desire to protectby Letters Patent is:

1. In a vacuum street sweeper a rigid frame, a second frame movablelaterally beneath said rigid frame, articulated and telescopic meansconnecting the forward and rearward ends of said movable frame with saidrigid frame, a housing carried by said movable frame and having anopening adjacent to the surface of the street, a flexible conduitconnecting said housing with the suction pipe of said sweeper,frictional cleaning means within theopening in said housing and meansfor supporting and for guiding said movable frame horizontally.

2. In a vacuum street sweeper a rigid frame. a brush revoluble in saidframe, a second frame movable laterally in the side of said rigid frame,articulated and telescopic means connecting the forward and rearwardends of said movable frame with said rigid frame, a housing carried bysaid movable frame and having an opening adjacent to the surface of thestreet, a flexible conduit connecting said housing with the suction pipeof said sweeper, a second brush and scrapers within the opening in saidhousin and means for supporting and for guiding said movable framehorizontally.

In testimony whereof, we have hereunto subscribed our names to thisspecification.

EDWARD K. WARD. PIER C. WARD.

